Our website uses cookies. By continuing to browse our site you are agreeing to our Cookie Policy.
Back To Top
Keystone Series GR ISO Butterfly Valves
Series GRW/GRL Butterfly Valves (ISO)
Keystone Series GR general purpose resilient seated butterfly valves are available in flanged, lugged or wafer body style for any service where drop-tight shut-off and maximum flow area is required.

Features

  • Double flanged body design with face-to-face dimensions, according to EN 558 Series 20, API 609 and AWWA C504 short.
  • Designed according to EN 593 and API 609.
  • The seat is field replaceable and fully isolates the body and shaft from the flow.
  • Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through the shaft area to the atmosphere.
  • A secondary shaft sealing provides back-up safety.
  • A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.
  • Shaft seals prevent moisture penetrating into the shaft area.
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life, and drop-tight shut-off.